// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.//// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// http://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License.#include "utils.h"namespaceDeepES{voidcompute_centered_ranks(std::vector<float>&reward){std::vector<std::pair<float,int>>reward_index;floatgap=1.0/(reward.size()-1);floatnormlized_rank=-0.5;intid=0;for(auto&rew:reward){reward_index.push_back(std::make_pair(rew,id));++id;}std::sort(reward_index.begin(),reward_index.end());for(inti=0;i<reward.size();++i){id=reward_index[i].second;reward[id]=normlized_rank;normlized_rank+=gap;}}}//namespace